I was using sposies a lot too, until I started with wool. But that only worked sometimes, so I had to figure out something new. So now I do a double stuffed pocket under wool. It works really well! I haven't had a leak since making the switch. And it's really not as bad bulk wise as some of the night time dipes.
But I don't blame you for sticking with the sposies. I told myself if I woke up to a wet bad one more time I was going back to them too. It's just too much to have to wash the sheets daily!

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Ali, mama to my amazing Arabella 1/14/06
and my new sweetie Judah! 4/8/11
Enjoying every day with the love of my life